See question in image.
Please show workings .

see explanation

Step-by-step explanation:

Given f(x) then the derivative f'(x) is

f'(x) = lim( h tends to 0 )

      = lim( h to 0 )

      = lim(h to 0)

      = (lim(h to 0)

      = lim( h to 0 )

      = lim( h to 0 )

      = lim(h to 0 ) -

Cancel the numerator/denominator of first fraction and h in the second

= lim ( h to 0 ) 1 - ( let h go to zero ), then

f'(x) = 1 -

f(x) is the value of the function. b is the value of the function when x equals zero or the y-coordinate of the point where the line crosses the y-axis in the coordinate plane.

step-by-step explanation:

hope this !